public IOWriteResult Write(TextWriter writer, List <WriteMesh> vMeshes, WriteOptions options)
{
int N = vMeshes.Count;
writer.WriteLine("OFF");
string three_floats = Util.MakeVec3FormatString(0, 1, 2, options.RealPrecisionDigits);
int nTotalV = 0, nTotalT = 0, nTotalE = 0;
// OFF only supports one mesh, so have to collapse all input meshes
// into a single list, with mapping for triangles
// [TODO] can skip this if input is a single mesh!
int[][] mapV = new int[N][];
for (int mi = 0; mi < N; ++mi)
{
nTotalV += vMeshes[mi].Mesh.VertexCount;
nTotalT += vMeshes[mi].Mesh.TriangleCount;
nTotalE += 0;
mapV[mi] = new int[vMeshes[mi].Mesh.MaxVertexID];
}
writer.WriteLine(string.Format("{0} {1} {2}", nTotalV, nTotalT, nTotalE));
// write all vertices, and construct vertex re-map
int vi = 0;
for (int mi = 0; mi < N; ++mi)
{
IMesh mesh = vMeshes[mi].Mesh;
if (options.ProgressFunc != null)
{
options.ProgressFunc(mi, 2 * (N - 1));
}
foreach (int vid in mesh.VertexIndices())
{
Vector3D v = mesh.GetVertex(vid);
writer.WriteLine(three_floats, v.x, v.y, v.z);
mapV[mi][vid] = vi;
vi++;
}
}
// write all triangles
for (int mi = 0; mi < N; ++mi)
{
IMesh mesh = vMeshes[mi].Mesh;
if (options.ProgressFunc != null)
{
options.ProgressFunc(N + mi, 2 * (N - 1));
}
foreach (int ti in mesh.TriangleIndices())
{
Index3i t = mesh.GetTriangle(ti);
t[0] = mapV[mi][t[0]];
t[1] = mapV[mi][t[1]];
t[2] = mapV[mi][t[2]];
writer.WriteLine(string.Format("3 {0} {1} {2}", t[0], t[1], t[2]));
}
}
return(new IOWriteResult(IOCode.Ok, ""));
}
public IOWriteResult Write(BinaryWriter writer, List <WriteMesh> vMeshes, WriteOptions options)
{
return(new IOWriteResult(IOCode.FormatNotSupportedError, "binary write not supported for OFF format"));
}
public IOWriteResult Write(TextWriter writer, List <WriteMesh> vMeshes, WriteOptions options)
{
int nAccumCountV = 1; // OBJ indices always start at 1
int nAccumCountUV = 1;
// collect materials
string sMaterialLib = "";
int nHaveMaterials = 0;
if (options.bWriteMaterials && options.MaterialFilePath.Length > 0)
{
List <GenericMaterial> vMaterials = MeshIOUtil.FindUniqueMaterialList(vMeshes);
IOWriteResult ok = write_materials(vMaterials, options);
if (ok.code == IOCode.Ok)
{
sMaterialLib = Path.GetFileName(options.MaterialFilePath);
nHaveMaterials = vMeshes.Count;
}
}
if (options.AsciiHeaderFunc != null)
{
writer.WriteLine(options.AsciiHeaderFunc());
}
if (sMaterialLib != "")
{
writer.WriteLine("mtllib {0}", sMaterialLib);
}
for (int mi = 0; mi < vMeshes.Count; ++mi)
{
IMesh mesh = vMeshes[mi].Mesh;
bool bVtxColors = options.bPerVertexColors && mesh.HasVertexColors;
bool bNormals = options.bPerVertexNormals && mesh.HasVertexNormals;
// use separate UV set if we have it, otherwise write per-vertex UVs if we have those
bool bVtxUVs = options.bPerVertexUVs && mesh.HasVertexUVs;
if (vMeshes[mi].UVs != null)
{
bVtxUVs = false;
}
int[] mapV = new int[mesh.MaxVertexID];
// write vertices for this mesh
foreach (int vi in mesh.VertexIndices())
{
mapV[vi] = nAccumCountV++;
Vector3D v = mesh.GetVertex(vi);
if (bVtxColors)
{
Vector3D c = mesh.GetVertexColor(vi);
writer.WriteLine("v {0} {1} {2} {3:F8} {4:F8} {5:F8}", v[0], v[1], v[2], c[0], c[1], c[2]);
}
else
{
writer.WriteLine("v {0} {1} {2}", v[0], v[1], v[2]);
}
if (bNormals)
{
Vector3D n = mesh.GetVertexNormal(vi);
writer.WriteLine("vn {0:F10} {1:F10} {2:F10}", n[0], n[1], n[2]);
}
if (bVtxUVs)
{
Vector2F uv = mesh.GetVertexUV(vi);
writer.WriteLine("vt {0:F10} {1:F10}", uv.x, uv.y);
}
}
// write independent UVs for this mesh, if we have them
IIndexMap mapUV = (bVtxUVs) ? new IdentityIndexMap() : null;
DenseUVMesh uvSet = null;
if (vMeshes[mi].UVs != null)
{
uvSet = vMeshes[mi].UVs;
int nUV = uvSet.UVs.Length;
IndexMap fullMap = new IndexMap(false, nUV); // [TODO] do we really need a map here? is just integer shift, no?
for (int ui = 0; ui < nUV; ++ui)
{
writer.WriteLine("vt {0:F8} {1:F8}", uvSet.UVs[ui].x, uvSet.UVs[ui].y);
fullMap[ui] = nAccumCountUV++;
}
mapUV = fullMap;
}
// check if we need to write usemtl lines for this mesh
bool bWriteMaterials = nHaveMaterials > 0 &&
vMeshes[mi].TriToMaterialMap != null &&
vMeshes[mi].Materials != null;
// various ways we can write triangles to minimize state changes...
// [TODO] support writing materials when mesh has groups!!
if (options.bWriteGroups && mesh.HasTriangleGroups)
{
write_triangles_bygroup(writer, mesh, mapV, uvSet, mapUV, bNormals);
}
else
{
write_triangles_flat(writer, vMeshes[mi], mapV, uvSet, mapUV, bNormals, bWriteMaterials);
}
}
return(new IOWriteResult(IOCode.Ok, ""));
}
// write .mtl file
IOWriteResult write_materials(List <GenericMaterial> vMaterials, WriteOptions options)
{
StreamWriter w = new StreamWriter(options.MaterialFilePath);
if (w.BaseStream == null)
{
return(new IOWriteResult(IOCode.FileAccessError, "Could not open file " + options.MaterialFilePath + " for writing"));
}
foreach (GenericMaterial gmat in vMaterials)
{
if (gmat is OBJMaterial == false)
{
continue;
}
OBJMaterial mat = gmat as OBJMaterial;
w.WriteLine("newmtl {0}", mat.name);
if (mat.Ka != GenericMaterial.Invalid)
{
w.WriteLine("Ka {0} {1} {2}", mat.Ka.x, mat.Ka.y, mat.Ka.z);
}
if (mat.Kd != GenericMaterial.Invalid)
{
w.WriteLine("Kd {0} {1} {2}", mat.Kd.x, mat.Kd.y, mat.Kd.z);
}
if (mat.Ks != GenericMaterial.Invalid)
{
w.WriteLine("Ks {0} {1} {2}", mat.Ks.x, mat.Ks.y, mat.Ks.z);
}
if (mat.Ke != GenericMaterial.Invalid)
{
w.WriteLine("Ke {0} {1} {2}", mat.Ke.x, mat.Ke.y, mat.Ke.z);
}
if (mat.Tf != GenericMaterial.Invalid)
{
w.WriteLine("Tf {0} {1} {2}", mat.Tf.x, mat.Tf.y, mat.Tf.z);
}
if (mat.d != Single.MinValue)
{
w.WriteLine("d {0}", mat.d);
}
if (mat.Ns != Single.MinValue)
{
w.WriteLine("Ns {0}", mat.Ns);
}
if (mat.Ni != Single.MinValue)
{
w.WriteLine("Ni {0}", mat.Ni);
}
if (mat.sharpness != Single.MinValue)
{
w.WriteLine("sharpness {0}", mat.sharpness);
}
if (mat.illum != -1)
{
w.WriteLine("illum {0}", mat.illum);
}
if (mat.map_Ka != null && mat.map_Ka != "")
{
w.WriteLine("map_Ka {0}", mat.map_Ka);
}
if (mat.map_Kd != null && mat.map_Kd != "")
{
w.WriteLine("map_Kd {0}", mat.map_Kd);
}
if (mat.map_Ks != null && mat.map_Ks != "")
{
w.WriteLine("map_Ks {0}", mat.map_Ks);
}
if (mat.map_Ke != null && mat.map_Ke != "")
{
w.WriteLine("map_Ke {0}", mat.map_Ke);
}
if (mat.map_d != null && mat.map_d != "")
{
w.WriteLine("map_d {0}", mat.map_d);
}
if (mat.map_Ns != null && mat.map_Ns != "")
{
w.WriteLine("map_Ns {0}", mat.map_Ns);
}
if (mat.bump != null && mat.bump != "")
{
w.WriteLine("bump {0}", mat.bump);
}
if (mat.disp != null && mat.disp != "")
{
w.WriteLine("disp {0}", mat.disp);
}
if (mat.decal != null && mat.decal != "")
{
w.WriteLine("decal {0}", mat.decal);
}
if (mat.refl != null && mat.refl != "")
{
w.WriteLine("refl {0}", mat.refl);
}
}
w.Close();
return(IOWriteResult.Ok);
}
public IOWriteResult Write(BinaryWriter writer, List <WriteMesh> vMeshes, WriteOptions options)
{
// [RMS] not supported
throw new NotImplementedException();
}